pyqt提示对话框

 from PyQt4.QtGui import *
 from PyQt4.QtCore import *
 import sys

 app = QApplication(sys.argv)
 msg_box = QMessageBox(QMessageBox.Warning, "Alert", "Please configure the baseline!")
 msg_box.show()
 app.exec_()

ss
if the alert show when click some button, should show like this:

 msg_box = QMessageBox(QMessageBox.Warning, "Alert", "Please configure the baseline!")

 msg_box.exec_()